Race chassis

[husaberg]

MB100/H100 is round tube spine. Final version of Kevs was pyramid braced which made a vast difference particularly when using kerbs and gutters for passing at Greymouth....
My R5 frame was the same. pretty sure the R5/DS7 was Yamaha's first robot welded frame - and it showed it.

Its only the two outer tubes on the MB5 that are oval.
If he had tires that were made in the current decade he might be able to keep out of the gutters
The welds themselves are not to bad just the wire.
1970, I was not aware they were using the robots that early in the piece.
The later 78 RD250 frame i am playing with has about 6 extra gussets and silly pressed metal overlaping pieces than the old frame and the TZ's ever had.

[Grumph]

Its only the two outer tubes on the MB5 that are oval.
If he had tires that were made in the current decade he might be able to keep out of the gutters

17in BT39's, sticky as, bro....

Starting off the back in a field of 30 odd and coming through to 4th in 5 laps means passing wherever you can....kerbs, gutters, fallen riders...
Someone put up a video at the time, Kev appears and passes between the camera bike and the kerb - then disappears in the distance

Pretty sure all the big MB's I've worked on used round tube.

Edit - Found a pic of the filthy thing post bracing. Clean tube is the new stuff added....

[husaberg]

17in BT39's, sticky as, bro....

Starting off the back in a field of 30 odd and coming through to 4th in 5 laps means passing wherever you can....kerbs, gutters, fallen riders...
Someone put up a video at the time, Kev appears and passes between the camera bike and the kerb - then disappears in the distance

Pretty sure all the big MB's I've worked on used round tube.

Edit - Found a pic of the filthy thing post bracing. Clean tube is the new stuff added....

Oh thats belts and braces stuff, i would have thought the weak link would have ben the flimsy swingarm plates and the little rear axel, has it got decent forks? I can't remember.
The steering head appears to be a lot better suported than the 50 Frame as is the rear brace above the swingarm.

[Frits Overmars]

If he had tires that were made in the current decade he might be able to keep out of the gutters.

And let such beautiful opportunities go to waste?
I remember my very first 500 cc road race on a street circuit. No gutters there, but kerbstones; even better.
In one of the corners the straw of a torn straw bale made the road slippery as hell and I slid against the kerbstone.
You'll never find better lateral grip. I could give it full throttle whilst still leaned over .

[husaberg]

And let such beautiful opportunities go to waste?
I remember my very first 500 cc road race on a street circuit. No gutters there, but kerbstones; even better.
In one of the corners the straw of a torn straw bale made the road slippery as hell and I slid against the kerbstone.
You'll never find better lateral grip. I could give it full throttle whilst still leaned over .

I think he needs to work on the jetting as its 4 stroking a lot.

[Grumph]

And let such beautiful opportunities go to waste?
I remember my very first 500 cc road race on a street circuit. No gutters there, but kerbstones; even better.
In one of the corners the straw of a torn straw bale made the road slippery as hell and I slid against the kerbstone.
You'll never find better lateral grip. I could give it full throttle whilst still leaned over .

You'd get along fine with Kev, Frits. Unused pieces of the road are just opportunities...

Current thinking here for street circuits is to place the bales on the road up against the kerbs to prevent a bike moving them...
IMO it has had the side effect of narrowing some circuits too much. The long established circuits like Greymouth (Husa's home track) still have exposed kerbs in a lot of places. Most are too slow (tight) for it to be a problem but I can still remember Dale Wylie breaking a vertebrae against a kerb at Wanganui many years back. We're pretty lucky we still have street circuits here.

From a chassis point of view, if you can build a bike which will survive the bumps on Wanganui or Greymouth, you're doing OK, LOL. Two sidecars pulled out of Wanganui this year with damaged chassis. One an LCR with the top guy in the world driving...

[guyhockley]

Plate frame Triumph, lots more if you search using Bucephalus plus motorbike, custom, triumph, or similar.

http://www.ebay.com/gds/Building-Buc...8960559/g.html

http://www.loadedguncustoms.com/blog.../11/bucephalus

Apologies if it has been posted before and I've forgotten...

[Grumph]

Here in NZ, Bucephalus was a well known 350 manx based special built and raced by the late Dick Hurdeman.
Think open bottomed Duke Velo frame and you'd be close.
Don't have a pic but someone may.

[mr bucketracer]

I think he needs to work on the jetting as its 4 stroking a lot.

ya could of put my race up

[husaberg]

ya could of put my race up

I was going too, but as you recall it was a little wet that day and i didn't want people to think it rains there.

[Grumph]

I was going too, but as you recall it was a little wet that day and i didn't want people to think it rains there.

Eighteen METERS annual rainfall doesn't give a hint ?

[husaberg]

Eighteen METERS annual rainfall doesn't give a hint ?

On the windward side of MT Cook, Maybe. We have excellent views of it though.
Greymouth is 2500mm or 100 Inch av
Where i live is 2000mm or 80 inch av
Its a bloody veritable subtropical osasis over here.
Palm trees line the streets, 3 frosts in 2 years, no snow in living memory.
You live in rabbit country while over here its marpupial paridise
49 years since the last major earthqauake as well.

[WilDun]

49 years since the last major earthqauake as well.

Careful, careful! famous last words and all that! - I live in Auckland but would never say that! we all live in the Shaky Isles!
Guess if you were racing buckets in Greymouth and there was a quake, you wouldn't even notice.

[husaberg]

Careful, careful! famous last words and all that! - I live in Auckland but would never say that! we all live in the Shaky Isles!
Guess if you were racing buckets in Greymouth and there was a quake, you wouldn't even notice.

That would have me finishing the bucket build Will, far higher chance of an earthquake and a ice age followed by a nuclear attack than that ever happening.
Auckland i would be more worried about the 100 or so Volcanoes Auckand built on top of
Pretty much the whole of down town greymouth is a liqufaction zone. Its mostly backfill silt.
The bumps are better then they were ,the worst in the braking zones past the Police station have been smoothed out a little.
The Greymouth track is highly cambered not always in a helpful direction.
The local council are very kind in accomadating the race, With such things as removable traffic islands sand blasted whitelines and all sorts of stuff.
The team that does the work are a great bunch of people and are never given the full credit they deserve.

[WilDun]

Auckland i would be more worried about the 100 or so Volcanoes Auckand built on top of

Yeah well, a fine example is the Mt Wellington track nestled right under Maungarei which has probably seen some pretty violent eruptions in its day! - but at the moment I enjoy living life amongst the volcanoes (that's probably the attitude the residents of Pompeii had too).

The local council are very kind in accomadating the race, With such things as removable traffic islands sand blasted whitelines and all sorts of stuff.
The team that does the work are a great bunch of people and are never given the full credit they deserve.

I went to Greymouth a few years ago and I think I missed the racing by about a couple of weeks unfortunately, - wasn't raining though!
Anyway, where I came from originally it rained nearly every day! and the people there did enjoy their bike racing big time and they also had genuine road racing - but strangely no actual street racing except when a town or village was part of a road circuit (but may have changed since I left over 50 years ago).
I think NZ is probably unique with it's motorcycle street racing